Color changing device for time indicating label and methods...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 9/00 (2006.01) B32B 33/00 (2006.01) G01K 3/00 (2006.01) G01K 3/04 (2006.01) G01K 11/12 (2006.01) G01K 11/14 (2006.01) G01K 11/16 (2006.01) G09F 3/02 (2006.01)

Patent

CA 2478308

The present invention relates to a time indicating label (100) comprising (a) a label substrate (102) having a first and second surface, (b) an acid-based indicator composition (104), and (c) an activator composition (106), wherein one of (b) or (c) are on the first surface of the substrate and wherein (b) and (c) when brought in contact remain adhered. The label (100) may have a pressure sensitive adhesive on the second surface of the label (100). The invention further relates to a method of using the time-temperature indicating label (100). The labels (100) provide an effective means for determine the safety of frozen foods. The labels also provide a means of providing security by providing name badges that are time sensitive and may not be reused. The name badges provide a means to monitor the length of a visitor~s time and prevents reusing the name badge.

L'invention concerne une étiquette indiquant l'heure comprenant (a) un substrat pour étiquette présentant une première et une seconde surface, (b) une composition indicateur à base acide, et (c) une composition activateur, l'une des deux compositions (b) ou (c) étant sur la première surface du substrat et (b) et (c) adhèrent lorsqu'elles sont en contact. Ladite étiquette peut présenter un adhésif sensible à la pression sur sa seconde surface. L'invention concerne de plus un procédé d'utilisation de ladite étiquette indiquant l'heure et la température. Lesdites étiquettes fournissent un moyen efficace pour déterminer la sûreté d'aliments congelés. Lesdites étiquettes fournissent également un moyen de sécurité par création de badges nominatifs qui sont sensibles à l'heure et ne peuvent pas être réutilisés. Lesdits badges nominatifs permettent de surveiller la durée d'une visite et empêchent une réutilisation du badge nominatif.

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